<template>
	<div>
		<!-- 面包屑导航区 -->
		<el-breadcrumb separator-class="el-icon-arrow-right">
		  <el-breadcrumb-item :to="{ path: '/welcome' }">首页</el-breadcrumb-item>
		  <el-breadcrumb-item>商品管理</el-breadcrumb-item>
		  <el-breadcrumb-item>商品列表</el-breadcrumb-item>
		</el-breadcrumb>
		<!-- 卡片区域 -->
		<el-card>
			<!-- gutter 设置之间的间距 -->
			<el-row :gutter="20">
				<el-col :span="8">
					<el-input placeholder="请输入内容" v-model="queryInfo.query" clearable @change="getGoodsList">
					    <el-button slot="append" icon="el-icon-search" @click="getGoodsList"></el-button>
					</el-input>
				</el-col>
				<el-col :span="4">
					<el-button type="primary" @click="goAddPage">添加商品</el-button>
				</el-col>
			</el-row>
			
			<!-- table 表格区域 -->
			<el-table :data="goodsList" border stripe>
				<el-table-column type="index" label="#"></el-table-column>
				<el-table-column label="商品名称" prop="goods_name"></el-table-column>
				<el-table-column label="商品价格(元)" prop="goods_price" width="95px"></el-table-column>
				<el-table-column label="商品重量" prop="goods_weight"  width="95px"></el-table-column>
				<el-table-column label="创建时间" prop="add_time"  width="150px">
					<template slot-scope="scope">
						{{scope.row.add_time | dateFormat}}
					</template>
				</el-table-column>
				<el-table-column label="操作"  width="200px">
					<template slot-scope="scope">
						<el-button size="mini" type="primary" icon="el-icon-edit" @click="showEditDialog(scope.row.goods_id)">编辑</el-button>
						<el-button size="mini" type="danger" icon="el-icon-delete" @click="removeById(scope.row.goods_id)">删除</el-button>
					</template>
				</el-table-column>
			</el-table>
			
			<!-- 分页区域 -->
			<el-pagination
			      @size-change="handleSizeChange"
			      @current-change="handleCurrentChange"
			      :current-page="queryInfo.pagenum"
			      :page-sizes="[5, 10, 15, 20]"
			      :page-size="queryInfo.pagesize"
			      layout="total, sizes, prev, pager, next, jumper"
			      :total="total" background>
			    </el-pagination>
		</el-card>
	</div>
</template>

<script>
	export default {
		data() {
			return {
				// 查询参数对象
				queryInfo: {
					query:'',
					pagenum:1,
					pagesize: 10
				},
				// 商品列表的数据
				goodsList:[],
				// 总数据条数
				total:0
			}
		},
		created() {
			this.getGoodsList()
		},
		methods: {
			// 根据分页获取对应的商品列表
			async getGoodsList(){
				const {data:res} = await this.$http.get(`goods`,{params:this.queryInfo})
				if(res.meta.status !== 200){
					return this.$message.error('获取商品列表失败！')
				}
				// this.$message.success('获取商品列表成功！')
				// console.log(res.data)
				this.goodsList = res.data.goods
				this.total = res.data.total
			},
			// 监听 pagesize 改变
			handleSizeChange(newSize){
				this.queryInfo.pagesize = newSize
				this.getGoodsList()
			},
			// 监听 pagenum 改变
			handleCurrentChange(newPage){
				this.queryInfo.pagenum = newPage
				this.getGoodsList()
			},
			// 删除对应id信息
			async removeById(goods_id){
				const cofirmResult = await this.$confirm('此操作将永久删除该数据, 是否继续?', '提示', {
				         confirmButtonText: '确定',
				         cancelButtonText: '取消',
				         type: 'warning'
				    }).catch(err => err)
				// 如果确认删除,返回字符串 confirm
				// 如果取消删除,返回字符串 cancel
				if(cofirmResult !== 'confirm'){
					return this.$message.info('已取消删除!')
				}
				// {data:res} 重构属性
				const {data:res} = await this.$http.delete(`goods/${goods_id}`)
				if(res.meta.status !== 200){
					return this.$message.error('删除数据失败！')
				} 
				this.$message.success('删除数据成功！')
				// 这个会覆盖页面
				this.getGoodsList()
			},
			showEditDialog(id){
				alert('暂无时间开发此功能' + id)
			},
			// 点击添加商品 跳转界面
			goAddPage(){
				this.$router.push(`/goods/add`)
			}
		}
	}
</script>

<style>
</style>
